ps4 disc driver thinks there's a cd inside, but there's nothing

Hi, my ps4 was having overheating issues so i took it apart yesterday to dust it off. I fully opened the ps4 and when I closed it I tried a few games and it wasn't hot anymore, yay! But I tried to put a game on the disc player and it didn't recognize the disc. I tried more discs and the result was the same. I thought I had left something stuck in the ps4 disassembly in the disc player so I took the entire disc player apart and reassembled it. When I turned on the ps4, the player was trying to read a cd, as there was none inside. And now I can't get a cd into the disc player because the input is blocked. some help? (I'm sorry if you didn't understand something I wrote, my English is not very good)